Cholera Outbreak. (2013). The History Channel website. Retrieved 8:35, May 23, 2013, from http://www.history.com/shows/mankind-the-story-of-all-of-us/videos/playlists/web-exclusives.
Cholera Outbreak. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/shows/mankind-the-story-of-all-of-us/videos/playlists/web-exclusives [Accessed 23 May 2013].
“Cholera Outbreak.” 2013. The History Channel website. May 23 2013, 8:35 http://www.history.com/shows/mankind-the-story-of-all-of-us/videos/playlists/web-exclusives.
“Cholera Outbreak,” The History Channel website, 2013, http://www.history.com/shows/mankind-the-story-of-all-of-us/videos/playlists/web-exclusives [accessed May 23, 2013].
“Cholera Outbreak,” The History Channel website, http://www.history.com/shows/mankind-the-story-of-all-of-us/videos/playlists/web-exclusives (accessed May 23, 2013).
Cholera Outbreak [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/shows/mankind-the-story-of-all-of-us/videos/playlists/web-exclusives.
Cholera Outbreak, http://www.history.com/shows/mankind-the-story-of-all-of-us/videos/playlists/web-exclusives (last visited May 23, 2013).
Cholera Outbreak. The History Channel website. 2013. Available at: http://www.history.com/shows/mankind-the-story-of-all-of-us/videos/playlists/web-exclusives. Accessed May 23, 2013.